Maou Reijou no Shikkousha: Maoukoku ni Tsuihousareta Munou Yuusha, Kakusareta Tenyo Skill de Musou suru

Synopsis

Summoned to another world to be the hero, Lute is told that he has "no abilities" and he is exiled to the demon territory. He has neither the skills nor the will to survive on his own, and while wandering the forest in the depth of despair, he meets… "Come to the Demon Lord's castle! I will give your life purpose!" It is Lurunoa, the only daughter of the Demon Lord, who was supposed to be his enemy! Lute is welcomed into the Demon Kingdom as Lurunoa's personal butler. And with this fateful encounter, his natural skill "The Hanged Man", which had been hidden until now, begins to grow into a powerful force that could shake the continent...? (Source: Sneaker Bunko, translated)